| Cabins Unlimited Norwich | Garden building supplier | 58 Yarmouth Rd | Mon 09:00–17:00 |
| Camrider Motorcycle Training Norwich | Motorcycle driving school | 7b Wendover Rd | Mon–Tue 09:00–17:30 |
| Canary Car Wash | Car wash | Costessey, Norwich NR5 0JS | Mon 09:00–17:00 |
| Cantonese Kitchen | Chinese restaurant | Kowloon Chinese, 97 Unthank Rd | Tue–Thu 16:45–22:00 |
| Caraparts (Wroxham) Limited | Caravan repair shop | 8 Christopher Wy | Mon–Tue 08:00–17:00 |
| Carters Heating Services | Central heating service | 18b Alston Rd | Mon–Fri 08:00–17:00 |
| Carys Flowers Ltd | Florist | 186-187 Market Pl | Fri 09:00–17:00 |
| Castle Promotions | Commercial printer | 22 Burnet Rd | Mon–Thu 08:00–17:00 |
| Catherine Cox Psychotherapy and Jungian Analysis | Psychoanalyst | Cherry Tree Rd | Mon 08:00–21:00 |
| Catton Windows and Conservatories | Joiner | 1-5 Meteor Cl | Mon–Fri 09:00–17:00 |
| Cavalier Mailing Services Ltd | Direct mail advertising | Units 28, 29 Mackintosh Rd | Mon–Fri 08:30–17:30 |
| Cavell Healthcare | Aged care | Business, Suite 6 Wensum Cres | Mon–Fri 08:30–17:00 |
| Cawdrons Butchers | Butchers | 103, The, High St | Mon–Sat 08:00–17:00 |
| Central Co-op Food - Mulbarton | Supermarket | Cuckoofield Ln | Mon–Sat 07:00–22:00 |
| Champion Property Management | Property management company | 390b Bowthorpe Rd | Mon–Fri 09:00–17:00 |
| Chateau Gateaux (formerly Sassa's Cakes) | Wedding cake shop | Church Hill | Mon–Fri 09:00–18:00 |
| Cheerful Links (Norwich) Ltd | Cash and carry wholesaler | 1 Whiffler Rd | Fri 09:30–18:00 |
| Cigs & Papers - Tobacconist and Vape Shop | Tobacco shop | 2 Exchange St | Fri 08:00–18:00 |
| CIM Signs & Graphics | Signwriting service | 9 Mackintosh Rd | Mon–Fri 08:00–17:00 |
| Circle of you | Counsellor | 35 Lobelia Ln | Mon–Fri 16:00–20:30 |
| City of Norwich Aviation Museum | War museum | Old Norwich Rd | Tue–Sun 10:00–17:00 |
| Cladspray Solutions | Cladding contractor | 15 Mason Rd | Mon–Fri 08:00–16:30 |
| Clark St. James Ltd | Advertising agency | 51 Colegate | Daily Open 24 hours |
| Classic Team Lotus | Motorsports shop | 6 Potash Ln | Mon–Thu 08:00–17:00 |
| Claydale | Laser cutting service | Unit 1 Bidewell Cl | Mon–Fri 08:00–16:00 |
| ClearMove | House clearance service | 4 Alder Cl | Daily Open 24 hours |
| Co-op Legal Services | Lawyer | 140 Thunder Ln | Mon 09:00–17:30 |
| Coffee Quest Ltd | Coffee machine supplier | One Way House, Station Rd | Fri 09:00–17:00 |
| Colman Wholesale | Commercial printer | Roundwell Works, Dereham Rd | Mon–Fri 08:00–16:30 |
| Commercial Laundry Equipment Laundry 365 | Laundry | Unit 426, 37 St Andrews St | Mon–Fri 09:00–17:00 |